Hello, There seems to be an issue with undo not working properly for material changes made via a script. For example, when running a script that changes material color of a selected layer, and then Undoing the script, visually (in viewport) all looks OK as if the change was reverted, but the mater…

Hi @Jarek , I have filed a new bug report: https://mcneel.myjetbrains.com/youtrack/issue/RH-65476 Sorry about this. It’s an oversight which I can easily fix. The fix should be available in the next service release of Rhino 7. John

Hi @johnc , that’s great, thank you for working on this fix!

@johnc - there is another thing that may be related to the fix you mentioned. If I add a new material either via Material Editor UI or via script, before it is assigned to anything in the file, RhinoScript methods like: MaterialCount MaterialIds don’t pick it up - it is visible in the materials …

Hi @Jarek , No, that won’t be related. I’ll look into it ASAP. John

Thanks John, please let me know if any script samples/file samples would be helpful in relation to the 2nd issue I have mentioned.

Seems like there is still a disconnect between RhinoScript methods that were developed way before the current materials system was in place, and how materials behave now. One thing I scratch my head about is why RhinoScript MaterialID method and RDK MaterialID method for the same material return di…

Hi @Jarek , No need to apologize; this stuff can be hard to understand. Usually, users don’t need to know the details of how Rhino works under the hood, but in the case of scripting, I think you need to know a bit more. I always find diagrams easier to understand than text, and in this case I think …

@Jarek FWIW check this and this . It may be hard to grasp at first glance BUT at some point, you will connect more dots then you can imagine :wink: [image] Jarek: invisible to the script engine Just fiddle with it a bit more. [image] Jarek: undo not working properly for material changes …

Hi @Jarek , Regarding MaterialCount and MaterialIds, the problem is that those two functions are operating on the ‘legacy’ Rhino material table which only contain materials that have been assigned to objects or layers. They don’t know anything about the RDK material list. When you create an RDK mat…

Hi @D-W , If I understand correctly, I think we are already looking into the FileIO problems. Here is a bug that was filed recently. https://mcneel.myjetbrains.com/youtrack/issue/RH-60209 Sorting this out will be a big job but rest assured that we are looking into it. John

Problem with undoing material changes made via script

Scripting

brian (Brian Gillespie) September 14, 2021, 10:51pm 20

RH-65476 is fixed in Rhino 7 Service Release 11 Release Candidate

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Problem with undoing material changes made via script

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